03. Endothermic or Exothermic?

LEARNING TARGETS 

• Define endothermic and exothermic reactions. Be able to deduce the reaction type given experimental data

• Draw labelled energy level diagrams to represent endothermic and exothermic reactions.

The following practicals will be done in the class. For each the temperature change will enable you to classify it as an endothermic or exothermic reaction.

This video summarizes the reactions and explains about drawing energy level diagrams:

Have a go at these examples to help you to understand how to draw an energy level diagram and what they represent.

Try these questions to test your knowledge.

The answers can be accessed here for you to be able to check your work.

Extra resources:

A GOOD EXPLANATION OF THE ENERGY DIAGRAMS:

Extension material (not needed for the course):

How to calculate enthalpy change from bond energy data.

and some to have a go at yourself: